. >>> one of the nation's largest teachers unions proposing a tough exam that teachers have to pass before entering their profession. a new report by the american federation of teachers says the exam would produce more qualified educators. the aft saying they don't want to just wait and see if a teacher's students will sink or swim. the test being compared to the bar exam for lawyers. i'm ainsley earhardt. back to on the record with greta. >> greta: political football. broadcaster bob costas using last night's halftime show to lecture sports fans about gun control. his speech sparked by the murder-suicide involving kansas city chiefs player jovan belcher. >> our current gun which you will yoculture,whitlock wrote, e convenience store cob frontations over music coming from car will leave teenage boys bloody and dead. they bait ugg us into embracing confrontation rather than avoiding it. >> ink jo us, ou jointly us is l panel. what do you think. appropriate, inappropriate, something in between. >> leading the subject matter aside, it's a real hot potato. you make comments about that using sp